A beam of electrons moving with a momentum p enters a uniform magnetic field of flux density B perpendicular to its motion. Which of the following statement(s) is (are) true?

Answer

4.5

Explanation

`R=(mv)/(q B), ` So `B=(mv)/(qR)=(9xx10^(-31)xx(8xx10^(6)))/(1.6xx10^(-19)xx0.1)=4.5xx10^(-4)T`